• Module: 62 x 34 x 11 mm • Strap Length: Adjustable from 63.5cm to 132cm • Weight: 54.4g • Water Resistance: 1 ATM • Battery: User-replaceable size CR2032 (3 volts) • Battery Life: Up to 3.5 years (based on average use of 1 hour per day) • Operating Temperature: 23°F - 122°F (-5°C - 50°C) • Radio Frequency/Protocol: 2.4 GHz ANT wireless communications protocol • Bluetooth Wireless Technology 5.0 • Range: 3 Metres • Washable